const Koa = require('koa')
const app = new Koa()
const views = require('koa-views')
const json = require('koa-json')
const onerror = require('koa-onerror')
const bodyparser = require('koa-bodyparser')
const logger = require('koa-logger')
var jwt = require('koa-jwt');
const cors = require('koa2-cors');
const index = require('./routes/index')
const users = require('./routes/users')
const category = require('./routes/category')
const goods = require('./routes/goods')

// error handler
onerror(app)
app.use(async (ctx,next)=>{
	try{
		await next()
	}catch(e){
		// console.log(e.name,"e")
		if(e.name=="UnauthorizedError"){
			ctx.body={code:401,msg:"验证失败"}
		}else{
			ctx.body={code:500,msg:"服务器错误"}
		}
	}
})/
app.use(
    cors({
        origin: function(ctx) { //设置允许来自指定域名请求
            if (ctx.url === '/test') {
                return '*'; // 允许来自所有域名请求
            }
            return 'http://localhost:8080'; //只允许http://localhost:8080这个域名的请求
        },
        maxAge: 5, //指定本次预检请求的有效期，单位为秒。
        credentials: true, //是否允许发送Cookie
        allowMethods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'], //设置所允许的HTTP请求方法
        allowHeaders: ['Content-Type', 'Authorization', 'Accept'], //设置服务器支持的所有头信息字段
        exposeHeaders: ['WWW-Authenticate', 'Server-Authorization'] //设置获取其他自定义字段
    })
);
// middlewares
app.use(bodyparser({
  enableTypes:['json', 'form', 'text']
}))
app.use(json())
app.use(logger())
app.use(require('koa-static')(__dirname + '/public'))

app.use(views(__dirname + '/views', {
  extension: 'pug'
}))

// logger
app.use(async (ctx, next) => {
  const start = new Date()
  await next()
  const ms = new Date() - start
  console.log(`${ctx.method} ${ctx.url} - ${ms}ms`)
})
app.use(jwt({ secret: 'secret618' }).unless({path:["/users/login"]}));
// routes
app.use(index.routes(), index.allowedMethods())
app.use(users.routes(), users.allowedMethods())
app.use(category.routes(), category.allowedMethods())
app.use(goods.routes(), goods.allowedMethods())

// error-handling
app.on('error', (err, ctx) => {
  console.error('server error', err, ctx)
});

module.exports = app
